ffmpeg-extra source package in Maverick

libavcodec-extra-52: No summary available for libavcodec-extra-52 in ubuntu lucid.
libavcodec-unstripped-52: No summary available for libavcodec-unstripped-52 in ubuntu maverick.
libavdevice-extra-52: No summary available for libavdevice-extra-52 in ubuntu lucid.
libavdevice-unstripped-52: No summary available for libavdevice-unstripped-52 in ubuntu maverick.
libavfilter-extra-0: No summary available for libavfilter-extra-0 in ubuntu maverick.
libavfilter-unstripped-0: No summary available for libavfilter-unstripped-0 in ubuntu maverick.
libavformat-extra-52: No summary available for libavformat-extra-52 in ubuntu lucid.
libavformat-unstripped-52: No summary available for libavformat-unstripped-52 in ubuntu maverick.
libavutil-extra-49: No summary available for libavutil-extra-49 in ubuntu maverick.
libavutil-unstripped-49: No summary available for libavutil-unstripped-49 in ubuntu lucid.
libpostproc-extra-51: No summary available for libpostproc-extra-51 in ubuntu lucid.
libpostproc-unstripped-51: No summary available for libpostproc-unstripped-51 in ubuntu maverick.
libswscale-extra-0: No summary available for libswscale-extra-0 in ubuntu maverick.
libswscale-unstripped-0: No summary available for libswscale-unstripped-0 in ubuntu maverick.